Wall-board.



R. COWARY.

Patented Feb. 6, 1917.

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'RALPH LOWRY, OF BUFFALO, NEW .YORIL ASSIGNOR TO rlI-IE BEAVER COMPANY,

v OF BUFFALO, NEW YORK, A. CORPORATION OF OHIO.

WALL-BOARD.

speciacanon of Letters Patent.

Patented ses. e, iai a.

vTo all whom it may concern:

Same.

The present invention relates to wall board suitable for lining clothes closets, attics and small rooms, more particularly where protection against moths and other vermin is desired.

Wall board may be made from wood fiber pulp, either ground on cooked wood, or chemical fiber, waste paper pulp or mixtures of these, and ordinarily is marketed in substantially rigid sheets, either multiply or single ply, and of convenient dimensions, say four to sixteen feet long and twentyfour tol seventy-two inches wide, and of a thickness approximating one-quarter of an inch. This can be used as a building material, more particularly for the inner wall of rooms, attics and the like, by nailing or tacking it directly to the studding of the house. It then serves in place of lath and plaster and has -many advantages as are well known.

It is the object of the present invention to provide a wall board which while possessing the lightness, cheapness, toughness and other advantageous characteristics of manufactured boards, shall also be of such a character as to give oi for a long time an odor repellent to moths and the like, and be particularly serviceable for the lining of closets and" other small rooms in which furs, woolens and the like are to vbe kept.

The nature of my present invention, and other objects and advantages, will be made clear from the following description, which is to be taken in conjunction' with the accompanying drawings, wherein- 'Figure 1 is an. enlarged section showing somewhat diagrammatically ore embodi- .v

ment of my invention, and Fig. 2 is a similar view of a second embodiment.

The wall board illustrated in enlarged cross-section in Fig. 1. comprises four plies,

1, 2, 3, and 4, cemented together Ato form a composite rigid wall board. These plies may be made from ground spruceiflber pulp in well known manner and as a cement for uniting them into a composite board I prefeiLte-use a silicate and clay mixtureconsisting essentially of an intimate mixture of about 100 lbs. sodium silicate of 400 Baume with 92 lbs. pulverized clay and about 15 lbs. water. The cement is applied to the component sheets of the board in a smooth and uniform layer while the sheets are fed in continuous manner between press rolls, and on hardening, this cement forms hard, dense strata extending uniformly from edge to edge of the board and securely binding the several plies together, as-indicated at 5, 6 and 7 of Fig. 1. Several plies may be cemented together with the grain or fibers of one sheet running cross-wise or at an angle to that ofthe adjacent sheet, as dis-' closed in United States Patent to Lewis No.

than four plies may be used,` as disclosed in that patent. Afterthe composite board has been completed' as above described, or even during the process of assembly, 1 apply to one .orpreferably both of the faces of the board, by means ofan arrangement of rollers, a coating of paint to which has been added 15% to 30% of an oil known to the trade as oil of cedar and consisting essentially of cedar wood oil. The oil penetrates into the somewhat porous plies of the board, as indicated diagrammatically at 8 and 9, Fig. 1. This coating may be made of such a tint that it will act as a ground color coat for further decoration by graining in imitation of the grain of cedar. This graining is preferably applied to but one ,side of the panel, and may beelfected by printing with ink by means of a large composition roller having the grain impressions on its surface. This decorative coat which constitutes the graining serves to partially seal the oil of cedar within the board, but not so completely but that the board has the odor. of cedar to an extent which renders it serviceable for the. purpose above indicated.

Wall boards made as above described `make it possible to convert a whole room, clothes press or attic into what is practically a -big moth-proof cedar chest, and by -applying-vthe oil of cedar t o both .sides of the board, the' cedar odor will be given of not only into the room to protect its contents from moths, but also from the backof the board into the crevices behind the panels and between the studding.

I have found that it is possible to incorporate oil of cedar with the silicate and clay mixture used as the adhesive, and when the oil is thus added to the extent of say 5%, it diffuses into the adjacent wood pulp, as indicated diagrammatically by the line crosshatching in Fig. l, and so gives to the board, layers of oil-bearing material intermediate the impregnated faces, these layers being in large measure separated from'one another and from the faces of the board by strata of hardened cement through which the oil and its odors do not readily pass. rlhe oil thus enytrapped within the board can, however, pass slowly outward toward the edge of the board where it will give off its characteristic and moth-repelling odor. It happens, however, that it is at the edge of the board that protection against moths and other vermin is particularly desired. rlhe boards be,

, come out but slowly at the edge of the board between the layers of sodium silicate cement, and owing to the fibrous condition of the cedar in these central plies, there is a large total surface area capable of liberating these odors as fast as they can migrate outward between the layers of cement.

`Various changes may be made in the arrangement and treatment of the several parts of the board without departing from the spirit of my invention, as defined by the appended claims.

I claim l. A rigid wall board comprising a plurality of iexible wood pulp plies cemented together with a sodium silicate cement, said board having its face impregnated with oil of cedar to serve as a moth repellent.

2. A rigid wall board comprising a plu` rality of wood pulp plies cemented together with a sodium silicate cement containing oil of cedar.

3. A multiply wood pulp wall board having its plies secured together with a sodium silicate cement and containing oil of cedar entrapped between adjacent layers of cement, whereby the board may act as a moth repellent fol1 a long time, substantially as described.

4. -A rigid wood pulp wall board comprising a plurality of plies cemented together, the faces of said board being impregnated with oil of cedar, and a decorative coating for one face of the board partially sealing the -oil within the board, substantially as de'- scribed.

In testimony whereof l affix my signature.

RALPH C. LWARY.' 

